The star, who had a huge following on social media, had encouraged fans to attend the tragic event in Orlando via online posts

“I saw her brother jump over the merchandise table and then it was just a blur. I turned and started running, then I heard another pop.”

Speaking about Loibl she added: “He seemed nervous. He was there by himself, looking around and moving, like he was trying to find something to do because he was on his own.

“He looked kind of creepy. He seemed around our age. He had no bag with him but had on a black hat and a red and black flannel shirt.”

Grimmie’s brother Mark tackled Loibl following the shots, and Riviera added: “I want to say a personal thank you to Christina’s brother, Mark. Since the shooter had so many weapons on him, it makes me wonder what he actually had in mind.

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“It also pains me to think, ‘what if Mark didn’t tackle the shooter?’ Mark definitely became a hero last night. His brave, strong soul was able to save the life of my friends, Christina’s other beloved fans, and myself.
“Because of him, my friends and I made it out of the venue safe and alive. ‘I am so grateful that people like Mark exist in the world because he was able to risk his life to save others and he did not have a second thought about it.
“I have so much love and respect for him and although I may never get the chance to let him know in person, I still want him to know that I am thankful for everything he did for me that night.”

Singing sensation Christina, 22, who placed third on the US version of the talent show in 2014, was shot in the head backstage at the event the Plaza Live theatre while she was signing autographs for her adoring fans.